Abstract
Experiments were carried out in a commercial marine shrimp farm in order to evaluate the use of two diets in Litopenaeus vannamei post-larvae, during nursery phase, on physiochemical wastewater quality. Two feeding methods were adopted: Commercial Feeding Method (MAC) and Artemia Feeding Method (MAA).0 The nursery tanks (60 m 3 ) were provided with 19 days post-larvae (PL 19 ) with a stocking density of 16PL/liter. After 10 days of culture, the concentrations of nitrogen (ammonia, nitrite and nitrate) and phosphorus compounds (total phosphorus and orthophosphate) in the nursery tank were smaller for MAC, rather than MAA treatment (p < 0.05). Consequently, MAA treatment induced low levels of daily compounds increment, thus contributing to a significant reduction of the nutrients that caused water eutrophication.
Highlights
A carcinicultura marinha no Brasil, sinônimo do cultivo da espécie Litopenaeus vannamei, tem apresentado extraordinário crescimento nos últimos anos (Rocha e Rodrigues, 2002)
No Brasil, em escala de potencial produtivo, ocorre principalmente no estado do Rio Grande do Norte, mais precisamente nos municípios de Macau, Grossos e Areia Branca
Antes das pós-larvas serem estocadas nos tanques -berçário, elas foram aclimatadas durante uma hora, objetivando minimizar as diferenças de pH, temperatura e do oxigênio dissolvido entre as águas contidas nos sacos de transporte e as dos tanques
Summary
Cultivos experimentais com pós-larvas do Litopenaeus vannamei, na fase de berçário, foram realizados em uma fazenda de camarão, objetivando avaliar a influência da utilização de duas dietas na qualidade físico-química das águas residuais. As dietas foram formuladas à base de ração comercial e náuplios de artêmia, denominadas MAC e MAA, respectivamente. Foram utilizadas pós-larvas no estágio (PL19), estocadas a 16PL/L em dois tanques-berçário de 60 m3. Ao final de 10 dias de cultivo, as concentrações dos compostos nitrogenados (amônia, nitrito e nitrato) e fosfatados (fósforo total e ortofosfatos) dos tanquesberçário foram menores na dieta MAA do que na MAC (p
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